ADC(VDDA) Input Volatge

[sanctified]

Hi,

I am not quite sure about this.

I have a STM32L100 µC operating at 1.8V, the analog pin sees a 3.0V coming from a battery and I want to use the ADC to be able to monitor the voltage of the battery.

I plan to supply the VDDA Pin with 3.3V (the VRef+ is internally connected to VDDA).

My question: Is this allowed. Can I give the VDDA a different voltage than what the µC is operating with?

I read the datasheet but i did not quite see the relation between VDD and VDDA.

[Tesla DeLorean]

Not a part I'm using, but other STM32 don't permit significant difference in VDD/VDDA

[TDK]

VDDA needs to be connected to VDD. It's in the datasheet.

[sanctified]

Okay. Thanks for your replies